<h3>Choose the correct form of the verb. </h3><h3>¿Dónde __________ Marcos? En la clase de español? estoy estás está están</h3>
<em>Answer : está</em>
Entire sentence : ¿Dónde <em>está</em> Marcos?
Explanation: The verb "estar" is used to describe the physical location of someone or something. As the subject in this sentence is "Marcos", that is third singular person, the verb must be conjugated in the third singular persona too. Él está.